1172080165 has 4 divisors (see below), whose sum is σ = 1406496204. Its totient is φ = 937664128.

The previous prime is 1172080163. The next prime is 1172080177. The reversal of 1172080165 is 5610802711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 136399041 + 1035681124 = 11679^2 + 32182^2 .

It is a cyclic number.

It is not a de Polignac number, because 1172080165 - 2¹ = 1172080163 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172080163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 117208012 + ... + 117208021.

It is an arithmetic number, because the mean of its divisors is an integer number (351624051).

Almost surely, 2^1172080165 is an apocalyptic number.

It is an amenable number.

1172080165 is a deficient number, since it is larger than the sum of its proper divisors (234416039).

1172080165 is an equidigital number, since it uses as much as digits as its factorization.

1172080165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234416038.

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 1172080165 is about 34235.6563395534. The cubic root of 1172080165 is about 1054.3523543882.

Adding to 1172080165 its reverse (5610802711), we get a palindrome (6782882876).

The spelling of 1172080165 in words is "one billion, one hundred seventy-two million, eighty thousand, one hundred sixty-five".